JPS5948643A - Artificially promoted tester for fastness to light - Google Patents

Abstract

PURPOSE:To maintain a sample consistantly at a fixed temperature by forming an air feed chamber below a testing chamber demarcated therefrom and closing a lower communication port for communicating the chamber to the discharge side of a variable capacity type blower. CONSTITUTION:A relatively broad air feed chamber 3 is formed below a testing chamber 1 and demarcated with a wall 2 and communicated to the discharge side of a variable capacity type blower 4 while the air intake side thereof 4 is communicated to an air conditioning equipment 5 comprising a humidifier and a heater. Then, an appropriate amount of air adjusted in the temperature and humidity is sent into the air feed chamber 3 according to the set capacity of the blower 4. An air feed cylinder 6 is provided on the top of the air feed chamber 3 communicating thereto and a lower communication port 6a is closed with a metal screen or a porous plate such as punching board. This can maintain a sample consistently at a fixed temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION In order to reproduce and observe the light fastness phenomenon of articles due to irradiation with sunlight, for example, artificial acceleration using an artificial light source with a short wavelength is used as a means of evaluating the aging resistance of the needle base of a d-polymer material. Testing equipment has been standardized by JI8, etc., but due to fundamental differences between the natural environment and an artificially reproduced environment, and the failure of various regulatory measures for the artificially reproduced environment. The main causes of this problem are the spectral irradiance of ultraviolet rays, the temperature of the test specimen, and the amount of moisture absorbed in the case of hydrophilic test specimens. In many cases, the control of these factors was insufficient, and the influence of the temperature of the test specimen was particularly large.

Currently, the use of a black panel thermometer is standardized as the sensor for measuring and controlling temperature in this type of test equipment, but although the temperature of the test specimen is sensitively affected by air flow, At present, no particular consideration is given to the flow of air to the test specimen, and therefore, the test results were not uniform because the temperature i' of the test specimen was not always maintained as a constant condition.

Figure 2 shows an example of a conventional testing device.
V'3 is equipped with an electric type rotating holding cylinder c' to which all the test specimens are attached, and an artificial light source d'lk is fixed inside it, and the test specimen by
Irradiate it to perform a light resistance test, and air 1111!
! A temperature/humidity conditioned air pipe blower f from equipment e was sent into the test chamber 8 yen at the bottom of the holding cylinder C. In this case, the conditioned air sent in is prevented from being diffused due to the external force by the surrounding wall g provided surrounding the lower surface of the holding WJC, but this only causes turbulence and causes damage to the test specimen. Artificially control the wind pressure, wind speed, air volume, etc. of the air flow! ! Therefore, no action was taken to regulate the temperature conditions of the test specimen to a constant level by means of air flow.

In view of the above-mentioned conventional test drive means, the present invention artificially regulates the wind pressure, wind speed, air volume, wind direction, etc. of air whose temperature and humidity are fully adjusted, and blows it against the test specimen. The purpose of the Temperature Association is to provide a basic environment for light resistance testing of articles under the same conditions and to provide equipment that allows accurate testing. Forming air supply channels and forming the channels
The inside is connected to the discharge side of a variable capacity blower, and the channel/:! - An annular blower tube is formed on the top of the tube, the lower communication port communicating with this is closed with a perforated plate, and the upper air supply port opening toward the test chamber is equipped with a rectifier for generating laminar flow. At this point, an I-shaped rotary holding cylinder was constructed with a ventilation wall concentrically with the cylinder above the cylinder, and the test specimen, which was removably held on the peripheral wall of the cylinder, was placed in an upward direction from the upper air inlet of the cylinder. The temperature that is blown out at the appropriate air volume and speed as a flow,
It is assumed that it is located in a humidity-controlled air supply path and is irradiated with an artificial light source.

A further embodiment of the invention is discussed with reference to FIG.

(1) is a test chamber, which is divided by a wall (2) below and has nine relatively wide air supply channels (3), which are connected to the discharge side of a variable capacity blower (4). and blower (4
) is equipped with air conditioning equipment consisting of a humidifier and heater (
5) to supply an appropriate amount of temperature- and humidity-conditioned air to the air supply chamber (4) according to the capacity setting of the blower (4).
It was made to send within -+31.

An annular air supply cylinder (61'i) is formed at the upper part of the air supply channel (3) in communication with the air supply cylinder (6).
The lower communication port (6a) is made of a perforated plate (7) with a large number of ventilation holes arranged in an even distribution like a wire mesh or a punching port.
Inside the upper air inlet (6b) of the inlet tube (6), which was closed by the test chamber (1) and opened into the test chamber (1), a rectifier (8) such as a honeycomb structure for generating a laminar flow of air was fully equipped. , blower (4
), the conditioned air blown into the air supply channels (3) is blown upward from the upper air supply port (6b) of the supply cylinder (6). Above the sending cylinder (6) is a ventilation wall (9a).
) is provided concentrically with the feed cylinder (6), and the ventilation wall (9) of the holding cylinder (9) is
The test specimen a0, which was removably held in B), was transferred to the feeding cylinder (61
It was placed in the air passage for conditioned air blown out from the upper air outlet (6b). There is also an artificial light source 31) inside the holding tube (9).
The light resistance test was carried out by irradiating the test specimen (to) with an average irradiation in a fixed position.

In the illustrated example, the holding cylinder (9) is supported on a J)IN-shaped fixed rail by a roller (6) attached to the lower part thereof, and a tooth ring (to) is formed on the outer peripheral edge of the lower part of the holding cylinder (9). The holding tube (9) is shown rotated at a set speed by driving the pinion α→ engaged with the electric motor (to), but the rotation mechanism may be rotated by other means as desired. Can be adopted.

Also, examples of artificial light sources (b) for irradiation include ultraviolet fluorescent lamps, car lights, etc. Although an arc lamp, a xenon lamp, etc. can be used as desired, the illustrated example shows a case where a gold ultraviolet fluorescent lamp is used.

In the above apparatus, air whose temperature and humidity have been adjusted in the air pAi equipment (5) is transferred to the air supply channels (3) having sufficient volume and cross-sectional area through the blower (4) set to an appropriate capacity. After uniformly lowering the wind speed by sending the air into the air, the air is blown upward from the annular blow cylinder (6). The wind speed is controlled by the resistance of the perforated plate (7), and the flow becomes a laminar flow through the rectifier (8) of the upper air supply port (6b) and is directed upward like an air curtain at a predetermined wind speed. Since the test specimen QO deposited on the holding cylinder (9) was placed in the annular air supply path, laminar air flowed throughout the front and back surfaces of the test specimen (2), and the test specimen The temperature of the test specimen α1 is controlled by regulating the environmental temperature of A light resistance test was conducted.

In addition, the upper air supply port (6b) in the annular pipe (61Vr-)
m is about 30 fog, and the wind speed on the surface of the test specimen is 1 to t.
The rotational speed of the drive motor of the blower (4) is adjusted and controlled so as to maintain it at an arbitrary value of oo''/a.

In addition, the holding cylinder (9) of test specimen 00 was all φ500m or φ960 according to the conventional JIS standard, and the use of a drum-shaped holding cylinder made of a metal plate wall with significantly different heat balance conditions was avoided.

Furthermore, in the illustrated embodiment, suction channels (7) are provided on the upper surface of the rotation holding cylinder (9), facing the air supply chamber (3), and suck the laminar flow air blown upward from the air supply chamber. The air curtain shape is maintained without disturbing the upward laminar flow until the end, and the entire ring is made smooth for reusing the regulated air used for temperature regulation. That is, the intake chamber (7) provided on the upper surface of the holding cylinder (9) has a slightly wider mouth than the opening width of the annular air supply cylinder (6) formed in the air supply channel (3) in communication with the intake chamber (7). Annular intake cylinder (1
7) is formed to face downward concentrically with the feed cylinder (6).

The lower intake port (17a) is equipped with a rectifier (to), so that the air inlet (x7a) can be connected to the intake chamber (g) without disturbing the laminar air rising along the next layer of the test specimen (a).
It was made to attract. In addition, the intake channels (G) are air conditioning equipment + circulation pipe pipes with ventilation control valves installed in the middle.
51 and to the intake side of the blower (4) 1
The ventilation control valve C1<1 is controlled manually or automatically, and by its switching operation, used adjusted air is circulated for reuse, and used air is discharged to the outside while new air is supplied to the blower. At the same time, adjust the amount of air.

Furthermore, in the illustrated embodiment, an ultraviolet fluorescent lamp (6) is used as the artificial light source, but in the case of this fluorescent lamp, the radiation output and life characteristics of the lamp vary significantly depending on the ambient temperature, that is, the outside temperature. In order to completely eliminate the temperature, as shown in the example shown in the figure, a Suita circulation path for the conditioned air for controlling the temperature of the fluorescent lamp is provided separately from the conditioned air for regulating the temperature of the fluorescent lamp. The temperature of (B) is preferably maintained at a constant value lower than that of all test specimens.

In the figure, 3υ is the blower used to regulate the temperature of the fluorescent lamp (b). 1@ is the air conditioning equipment, and the air supply chamber (
(2) is the annular intake cylinder, (2) is the annular intake cylinder S@ is the ventilation control valve, and (2) is the reproduction pipe.

According to the present invention, the entire test specimen is irradiated with light from an artificial light source as described above, and is placed in a laminar air flow environment with controlled humidity in Marugame, having predetermined wind pressure, air volume, and wind speed conditions. Since the temperature is regulated, the test specimen can be maintained at a constant temperature throughout, satisfying all the basic conditions of the light resistance test, and the method is extremely simple and easy to operate.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing an embodiment of the device of the present invention, and FIG. 2 is a cutaway side view showing an example of a conventional device. (1)...Testing room, (3)...Air supply chamber/par, (
4)...Blower-1 (5)...Air conditioning equipment, (6
)...Annular blowing cylinder, (6a)...Lower communication port, (6b)...Upper air blowing port, (7)...Perforated plate, (
8)... Rectifier, (9)... Rotation holding cylinder of test specimen,
αO...Test specimen, (11)...Artificial light source. Patent applicant: Uejima Seisakusho Co., Ltd. Agent: Kin Kitamura - 2 others

Claims (1)

[Claims] The air supply chamber is divided into the lower part of the test chamber.
The chambers are connected to the discharge side of a variable capacity temperature blower, and an upper inlet is provided in the upper part of the chamber, the lower communication port communicating with this is closed with a perforated plate, and the upper part is opened to the test chamber side. An annular blower tube was formed at the air port and was mounted on a rectifier for laminar flow generation, and in the test chamber, a cage-shaped rotary retainer consisting of a ventilation wall was installed on the upper blade of the blower tube concentrically with the blower tube. The test specimen, which is removably held on the surrounding wall, is placed in the air passage where the temperature and humidity are adjusted and the air is blown out as an upward laminar flow from the upper air outlet of the blast tube at the appropriate wind pressure, air volume, and speed. An artificially accelerated lightfastness testing device comprising: